Exactly Vince. Pressure raises the boiling temp about 2-3 degrees for each
pound of pressure. And
the reason for closed systems is to allow overpressure to drain into a
container separate from the
radiator. When it cools, some of this drains back due to the pressure balance.
Vehicles weren't so
sophisticated years ago and thus the overpressure gets dumped into your
driveway
----- Original Message -----
From: Vince Kieffer <vk30345@navix.net>
To: oletrucks list <oletrucks@autox.team.net>
Sent: Tuesday, March 28, 2000 10:26 AM
Subject: Re: [oletrucks] moving on
> Correct me if I'm wrong ..but, Isn't the reason for a sealed and pressurize
> cooling system so that you can exceed boiling point (212 degrees) without
> boiling over. The same effect as a pressure cooker, temperatures over the
> boiling point can be obtained if the liquid is under pressure. Also the same
> reason you don't take the radiator cap off if the engine is hot, the pressure
>is
> released and the radiator boils over, some times violently. So, seems to me
> that a good radiator cap, of the correct pressure rating will fix the boil
>over
> problem..
>
> Vince Kieffer
> 50 Chevy 3600
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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